Difference between revisions of "Digital Ethernet Large-scale-integration UNIBUS Adapter"

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[[Image:m7521.jpg|thumb|right|200px|M7521]]
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[[Image:m7521.jpg|thumb|right|250px|M7521]]
  
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This is the DEULA Ethernet adapter for [[VAX]]en and [[PDP-11]]s.
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The '''Digital Ethernet Large-scale-integration UNIBUS Adapter''' (short, and usual, name '''DELUA''') was [[DEC]]'s second [[UNIBUS]] to [[Ethernet]] [[network interface]]. It consisted of one [[DEC card form factor|hex]] board, the M7521.
  
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{{stub}}
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A number of complex [[integrated circuit|chips]] are used:
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* [[Motorola MC68000]] [[microprocessor]]
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* [[LANCE]] Ethernet chip
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* [[DEC part number]] 21-22703-02 (function currently unknown)
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The DELUA has 128KB of [[Dynamic RAM|DRAM]] (using 64Kx1 DRAM chips), probably with [[parity]], used for both [[buffer]]s, and also to hold the microprocessor's [[object code|code]]; there is also 16KB of [[ROM]] containing its [[firmware]], which is copied to DRAM on startup, as the latter is faster.
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==See also==
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* [[Digital Ethernet UNIBUS Network Adapter|DEUNA]], the DELUA's predecessor
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{{semi-stub}}
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==Further reading==
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* ''DELUA Technical Description'' (EK-DELUA-TD)
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* ''DELUA Field Maintenance Print Set'' (MP-01787)
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==External links==
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* [http://www.bitsavers.org/pdf/dec/unibus/EK-DELUA-UG-002.pdf DELUA User's Guide] (EK-DELUA-UG-002)
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* [http://www.bitsavers.org/pdf/dec/unibus/firmware/DELUA/ DELUA] - firmware
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[[Category: UNIBUS Network Interfaces]]
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[[Category: Ethernet Interfaces]]

Latest revision as of 14:13, 16 October 2024

M7521

The Digital Ethernet Large-scale-integration UNIBUS Adapter (short, and usual, name DELUA) was DEC's second UNIBUS to Ethernet network interface. It consisted of one hex board, the M7521.

A number of complex chips are used:

The DELUA has 128KB of DRAM (using 64Kx1 DRAM chips), probably with parity, used for both buffers, and also to hold the microprocessor's code; there is also 16KB of ROM containing its firmware, which is copied to DRAM on startup, as the latter is faster.

See also

  • DEUNA, the DELUA's predecessor

Further reading

  • DELUA Technical Description (EK-DELUA-TD)
  • DELUA Field Maintenance Print Set (MP-01787)

External links

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